I actually have one of the first gen NUCs with the Core i3. My wife uses it in her home office and it works perfectly for what you mentioned. I have 2 1080p monitors hooked up to it via the HDMI ports.Reply

I am sorry, but I could not disagree more. Your evaluation is probably based upon your mobile web experience on your smartphone. Most "normal" websites, the kind that you like to visit when you are siting behind a desktop, feel very slow on our Atom based pc (1.8 Ghz N2800) and reading some PDFs with some pictures is pure horror. And do not even try to print a word document with 20 pages ... that takes minutes. You would be surprised how fast you miss the high single threaded performance of modern CPUs.Reply

I can't believe that people actually argue about such ridiculously stupid things.

"I could not disagree more" means that I am already disagreeing the maximum amount possible -- if I could disagree more, I would; but I can't because I already disagree as much as possible. Get it?Reply

Not a double negative. Read a book, preferably one concerning grammar and english usage. "So you actually agreeing with ddriver." Something's missing. By the way, "dis" is not negation. (This is not a double negative statement, as well.)Reply

You can be sorry and disagree all you want but this will not change the facts.

That particular atom chip is a POC, slower than even mid-range contemporary phones, with terrible GPU (cripples browser rendering performance) and running a bloated OS. I have very smooth experience with both "desktop" websites (I hate crippled mobile versions) and with PDFs sporting high resolution images (here the reader implementation plays a tremendous role) on my phone (note 3) - that type of content is literally FLYING. I haven't been printing from the phone yet, but I am pretty sure it will not take minutes to print a 20 page document.

And don't think for a moment that I am used to sluggish performance and therefore have lower standards and expectations. My desktop config: i7 3770k 32gb samsung 830 SSD - while 2 years old, by no means a sloth.Reply

I have both the Samsung Series 3 (Exynos 5) Chromebook and the new Haswell-based C720. Performance difference/day-to-day usability is night and day, the C720 blows aways the ARM Chromebook. While I'd imagine TDP to be slightly higher, the C720 actually has much longer battery life (8h vs 5h) while only being 3-4 ounces heavier. The C720 also has better build-quality, screen, keyboard, and trackpad...Reply

I guess I will have to benchmark it to prove it. You are downplaying the N2800, but it was close enough to a 1.4 GHz Quad Cortex A9 with a 2 MB L2 (Calxeda ECX-1000). That is very similar to the current midrange Phone. In fact, given how bandwidth bottlenecked most ARM CPUs are, the 4 MB L2 would probably give that chip an edge over the current midrange. Reply

There is something about Intels CPU-design vs ARM that does not show in benchmarks like Geekbench and similar. Even the old Z2460 (single core "old" Atom) platform still feels quite snappy when running Android, the "feel" of this SoC is way better than what one would believe when looking purely at benchmarks.

My guess is that Intels CPU-cache design, especially L2, still is a couple of notch above what any ARM CPU vendor current got.Reply

I absolutely agree. In the past I tried to show that as benchmark results show, a single Atom Core is quite comparable to anything between one and two A9 cores. However, many poster simply choose to ignore this fact, accusing me to be totally wrong...Reply

Well if you can kindly point us to an arm equipped device similar in size, with the same kind of ports, that actually runs win8 and is available, by all means post the link. Until then, you can hypothetically speaking all you want.Reply

Yeah, I'm going to need to call BS on that. I assume that you haven't actually tried using those ARM SoC boards. I've tested most of the "high performance" ones (ODROID-X2 (Exynos 4), Samsung Chromebook (Exynos 5), Wandboard and UDOO (i.MX6 Quad)) w/ Ubuntu. First of all, cost on those are ~$150 w/ cases/power etc, so far from 1/5th the price (that's w/ soldered-in not-enough RAM and no storage). And second, the performance and software compatibility (anything from uBoot issues, to X11 drivers, to Flash Player) make them far less than ideal for general purpose usage.

The ARM SoCs make for great embedded boards - TDP is great and the IPU/VPU on the i.MX6 is really interesting, but a good experience for Jane User? No way.

For general computing work, the i5 may be overkill, but a 1037u BRIX retails for $170 (+$40 for a 4GB SODIMM) which is probably where I'd start.Reply

After trying the Steam In Home Streaming beta, I think the market for such machines as a secondary gaming station for PC gamers will increase.. if you have a solid gaming machine on the same network, this is all you'd need for playing those games on your TV at full fidelity.Reply

AT and Ganesh, thanks once again for an excellent review. I have a couple of questions and a suggestion:Q1. I am planning to build an audio server (optical or usb out from the PC - feeding to the rest of my stereo chain - Audio GD DAC acting as a DAC and preamp, Parasound power amp, and floorstanders). The NUC seems to be the ideal form factor for an audio server. Do you have any thoughts on this? Do you test audio quality (specifically stereo - not gaming audio) during your review and tests? I'm actually not planning to use the DAC of the onboard sound so that actually would not be an issue for me.

Q2. Another option I have been mulling over is to build a multi-purpose "steam box" kind of a device - that will let me run this SFF PC as an audio server, as an HTPC with XBMC, and will also let me do light to mid-level gaming with Steam big picture. I was actually waiting for Kaveri which I think will actually be more viable - but am not sure how well Haswell's integrated graphics stand up with something like Kaveri or even a graphics card. Especially with thermals and throttling in mind. What are your thoughts on the viability of the NUC in this regard? Do you have any pointers on what one should look at - considering that it should also be a small form factor (shoebox size)?

S1: This might sound silly, but can you please post pictures of the cabinets and boxes with some other object in the picture as well - to give us a visual perspective of how big/small it is? I see so many pictures of mini ITX cabinets and other HTPC cabinets, but almost all of them lack the size perspective. Looking at the pictures, I have no way to visually judge if it will fit in my media cabinet at all. I have to look at the dimensions every time and it is painful. For example, you could post a picture of the cabinet with a picture of an iPad alongside.Reply

Thanks. Wow, that is tiny indeed. Slightly OT - I have a Minix Neo X5 which has somewhat similar dimensions and is also fanless. It is actually quite a credible audio (and average quality video) server. However, being on the Android platform and based on some Rokchip version, the lack of software support is frustrating. For example, I wanted to install LMS (Logitech Media Server) so that I can serve audio to my Squeezebox. However, there is no port of LMS to Android that I know of.

Maybe, I should wait for the Silvermont version of NUC. It is supposed to release in the next couple of months. It can act as a fully fanless audio server. On second thoughts, having gaming expectations from this small a device is not a great idea.Reply

I have the i3 Haswell NUC and use it solely as an XBMC server via OpenELEC. I leave it on all the time, with XBMC set to turn off its display after X minutes. I measured 6W idle on mine, which nicely matches Ganesh's findings.

And sitting 8-10 feet away, I can't hear the fan at all. It's probably OFF when idling at 6W, and I still hear nothing during a movie (the quiet parts), as the NUC only pulls 13W when playing 1080P video.

Personally, I believe that a Bay Trail (especially Bay Trail D) / Silvermont based system is the best fit for a NUC form factor. We could build a very viable system for well under $500, with a system draw in the 10W-15W range that can give us a fully fanless system if we wanted to, and will still have the same horsepower as a Core2Duo system (Bay Trail D). I feel that Haswell is a wrong choice from a cost, heat, and noise perspective.

Intel will release a bay trail NUC shortly. Should be powerful enough for HTPC tasks but 23.976Hz capability is unknown. Unfortunately it only supports one SATA, so HDD+mSATA is not possible as it is with these Haswell NUCs.Reply

1. For HTPC reviews, we don't test audio quality because the traditional use case is to get digital audio out of the HDMI port and on to the AV receiver for further processing. The on-board DAC is not that important for the living room HTPC, though I can see it being an issue in other scenarios. But, again, I feel that in the other scenarios, ease of use / power etc. take more precedence over onboard DAC sound quality (as long as it is not absolutely horrible).

2. I wouldn't suggest a box this small (and with this power envelop) for mid-level gaming. Light gaming might be OK. You could consider the BRIX Pro with Iris Pro, but the thermals on that m/c are yet to be evaluated.

Even with a digital out, there seems to be a huge amount of variability in terms of jitter. Maybe this is overkill, but I love the fact that you guys do reviews so thoroughly, and would love it even more if you could review sound quality in more detail. IMHO, sound quality is often neglected and people tend to see this as the domain of "audiophiles". However, it is as important (if not more) as video quality on which several pages of a typical review are normally dedicated. All the more because DACs are getting hugely better and more affordable, and so are other components like headphones and amps. In a reasonably "revealing" system, audio quality starts making a big difference. Again, just my two cents. Reply

When I saw this review, I got excited that this could provide a high-quality Mac mini alternative. However, once you add the SATA, memory, and wireless card, and OS (if you want to run Windows) the Mac mini is a better value, plus you get OS X (if you want that). Even running Linux, this thing doesn't make much sense from a price point of view (unless you really value DIY).Reply

True it gets expensive, which is a bummer. A desktop i3 w/ 4400 or 4600 iGPU would be faster than the HD 5000 and cost less. A cheap 2.5" HD would also be about $130 less. Full-sized RAM can be had for cheaper as well.I get that NUC = low power, they could easily bring the cost of a complete system down to $500 by making a few small compromises in TDP. For $780 w/Windows you can get an equivalently powerful laptop/convertible that naturally has a screen and more connectivity.Reply

The Mac Mini isn't necessarily any better value. Configuring one to the 8GB like this NUC and you're already at the same cost. You then have to upgrade to SSD in the Mini, and that puts you over $1k. The real problem is that these very small systems don't actually cost less than a full-size computer. They deliver less performance at the same cost in the name of form factor and efficiency. Which, y'know, if that's what you value, that's a perfectly reasonable way to spend the money. But, the idea that smaller equals cheaper is certainly an illusion.Reply

The interesting point is not that the mini is absolutely cheaper. It's that, even after years of it not being true, we still hear a constant whine about the "Apple Tax". There's value in simply pointing out, repeatedly, that Apple products, whether it's mac mini or mac pro, are comparably priced to the competition. You can find details that are different, but the point is "comparably" priced, not outrageously more expensive.What IS the case (which may or may not matter to a buyer) is that Apple doesn't sell low-end stuff --- if you want something comparable to that $350 laptop in Best Buy, well, Apple isn't going to sell you a laptop with those (low-end) specs at that (low-end) price.

Of course you lose SOME flexibility if you go with a Mac Mini. But you also get some things in return, right now, most obviously, Fusion drive.

On the third hand, it's kinda a moot point because, for reasons that are unclear, Apple STILL does not ship a Haswell mac mini, so if Haswell is important to you, it's NUC or nothing.(My hypothesis is that Apple is delaying the mini update to try as best they can to even out their revenue stream. Right now they have this crazy unbalanced system where they upgrade the laptops as soon as Intel has the CPU ready, so generally Q2, then Q3 they release the new iPhone, Q4 is the new iPad and iMac, plus Christmas and Chinese New Year plus the iPhone delayers who didn't upgrade the day of the release so a FLOOD of cash, then a lean Q1. Post Jan 1 purchases for Chinese New Year help a bit, but if you release a new mini in Q1 rather than Q2,3,4 you do make some small change at the margin to move revenue into Q1.

We'll see if I'm right soon enough...

The other thing they could do to even things out would be to establish a pattern of speed bumps for iOS devices in late Q1/early Q2. With their control over the CPU this should now be possible, and establishing a pattern of speed jumping by 10% or so, just a 100 or 150MHz bump, on the 6 month beats would again do something to start shifting revenue and demand across the year. It can't be optimal for productivity to have factories ramp up for such massive demand concentrated into three months, and more idle the rest of the year.) Reply

In addition to the lack of low end offerings, Apple's value "tax" can also kick in as the months roll by in between their often lengthy refresh cycles. A model that had good components at a reasonable price on the day it was introduced, can sometimes start to look really non-competitive in its 11th month.Reply

Yes, the price will get close to a Mac Mini.And then:- A Mac Mini will retain its value over time very well. You can sell it after some years for a good price.With a NUC, you can probably forget about that.- OSX - which is great.- Thunderbolt ports- Better case- Built in power supply- Supports high end audio when you use a DAC, the clock form the DAC can trigger OSX, which is great.- Great drivers, everything works out of the box- They built it, tested it and will support it for you. Apple takes a lot of responsibility to make sure everything works well together, where other manufacturers offer just the bare hardware and ask almost the same amount.Reply

I hope this board layout, nano-ITX or pico-ITX gets more popular among motherboard and case makers. Sometimes, I want to put something together that may not actually be super small but want to have a lot of internal space for other things.Reply

I have almost this same NUC build (but I went with 16gb RAM and a 240gb Intel SSD). So far I'm quite happy with it. My favorite thing is using DP 1.2 MST to drive 2 monitors. I'm glad all 4 usb ports are USB3, though I don't have any USB3 devices.

The bad thing I encountered is drivers. Win 8.1 x64 didn't detect and install drivers for the AC7260 wifi card automatically, which of course handicapped the rest of the install due to lack of internet connection. Therefore I had to install most of the drivers manually, which, these days, is pretty lame in my opinion. There are still 3 "unknown" devices in device manager which haven't been addressed by windows.

I've had this NUC since Thanksgiving, so hopefully MS/Intel have corrected the driver issue I experienced.Reply

Which devices are not being recognized? I had some devices not recognized on my box, but I was able to clear those up by downloading drivers from the NUC product support page. I downloaded the Management Engine Driver, the Nuvotron Driver, and (IIRC) the Gigabit Ethernet controller driver.Reply

Device manager lists them as "PCI Simple Communications Controller", "SM Bus Controller", and "Unknown device". I strongly suspect the "unknown device" is the IR receiver (Nuvotron). I guessed I could probably get drivers for these devices from Intel's support page, but since not having them hasn't really affected the operation of my PC, I never bothered. I just dislike knowing that things aren't "perfect".Reply

Thanks for the review. I'm getting a new HTPC any day now. Should I get the NUC or a Mac mini?

I like Macs better and I know it will work with my TV's remote control, since it supports Apple remotes. But, apparently, there are issues with 24p both on Intel HD 4000 (which is off by 00,003 fps and thus shouldn't matter?) and OS X, which outputs exactly 24 fps and not 23,976. This causes judder, even if Plex/XBMC is set to match video speed to refresh rate. Apparently, you can fix this with SwitchResX, but it's a hack. I would probably run Windows on the Mac anyway for HD audio support. How serious is the Intel HD 4000 24p "bug", really? 00,003 frames sounds like nothing.

I'm also interested in what type of IR commands the NUC supports. With the Mac, I know what I'm getting and that it works, but I have no experience with the NUC. Incidentally, I need to find out if the NUC can be made to listen to any of the IR codes in my TV's database. My TV has IR blasters and downloads IR codes from the web, but that requires that the right codes are in the database. If the NUC can listen to an Apple remote, then I know it will work.

I lost interest in this review when I realized that the system didn't have Iris Pro. Why is Intel so stingy in parceling out this SKU? Are they having yield problems? At this point, for all intents and purposes, it appears to be a rMBP-only part. I did a Google search for the Gigabyte BRIX that's supposed to have Iris Pro, but found only announcement articles - no reviews and no sellers. Has that been released yet?

I really don't get Intel's strategy with Iris Pro. It's almost like they don't want it to succeed.Reply

I'm also looking forward to the Brix Pro review, but please do some gaming tests in addition to the HTPC stuff. I'm curious how an Iris Pro part compares to a hypothetical Steam box with AMD's integrated graphics or a low-end discrete card. (I'm guessing it'll be thermally-limited, though I don't know what the Brix Pro's cooling is like.)Reply

MY assumption is a combination of limited production capacity, and/or too much power consumption to put it anywhere except the top of the product range. It's currently only on 47W TDP models; estimating it's share of the total TDP isn't easy because the best match for the CPU in the fastest Iris pro is a 37W part while the best match for the CPU in the slowest IRIS pro is a 17W model. While there's probably differential binning going on, it suggests that a lower performing IRIS ram chip is a power pig.Reply

Many of the good small ones need to be imported for US customers which just adds to the already high cost. At least for me anyway. I don't mind going with a quieter fan solution as long as the noise doesn't annoy me especially when watching movies.Reply

And, regarding 4K -- my best advice, which I read myself as I had the same concern -- buy a new $400 toy when 4K finally becomes mainstream and you have both the content, and a television, and an HDMI interface, and a receiver to play them with. Don't worry about future-proofing a sub-$500 item. :)Reply

Yes, this can do 4K video to the extent of what other GPUs from AMD / NV can do. I am not so sure about very complicated 4K encodes. We plan to standardize our 4K HTPC evaluation in Q3 when HDMI 2.0 (4Kp60-capable) sources and sinks come into the market.

Fan noise is only an issue if you are using it as an office machine and sitting less than 3ft away from it (and that too in a quiet environment). This issue is there at idle too.

If you are 3ft. or more away, I don't think it is even possible to hear the fan :)Reply

Still too pricey imo for what it is and what it is limited in doing. I was wondering why a rash of sales popped up on the last-gen NUC with i3 + Thunderbolt today, on sale at a variety of places for $160. That is what I am looking to pay for one of these units given the fact you still need to buy RAM and an mSATA. I wonder if Intel would introduce a cheaper Atom version as Atom seems to be the cure for all Intel-price-related woes. :D

I was hoping this updated version corrected the biggest downside of the original, the requirement of mSATA but it only looks like the pricier WYKH SKU allows for full 2.5" SSDs. I have plenty of those in the 120-128GB range so I'd rather not spend another $120 or so on a similar sized mSATA drive. Also, Intel still not including a mickey-mouse power cable is ridiculous, it really feels like they are doing everything they can to not sell these things.Reply

I never understood why Anandtech never mentiones anything about Linux in their hardware reviews. This seems like a perfect htpc device to put Linux on and I am sure that some readers would be happy to know what are the hoops to go through on the Linux side, the state of Netflix, any driver issues etc. Why pay the Windows tax if you can get the same or pehaps even better experience for free?Reply

There are other components where it would be nice if they were tested on Linux especially as part of a particular system like the BRIX and NUC. Scouring for info for each component is less desirable than having the entire system tested and reviewed in a single article.Reply

I always hope AT will write more on Linux topics but they never do. The focus is almost solely on Windows. It'd be nice if they did hardware reviews with Linux and give the usual details of what works and what doesn't and other very detailed information.

The only okay site I know of that does Linux hardware stuff is Phoronix but that site uses tests that aren't that meaningful especially for non-GPU hardware and desktop use. For other hardware, they just gloss over many details. Their "analysis" are often blurbs like the power consumption is less than system x. Useless, I can see that on the graph and the system x is some much higher performing non-comparable device.Reply

Main limitation I think for HTPC use for people like me is lack of ability to play CableCARD DRM content. I've looked into the alternatives, and there still isn't anything on the Linux/Android/iOS market yet that can replace Windows Media Center for Premium CableCARD content (HBO, MAX, SHO etc.) DLNA is enabling some workarounds (PS3, native SmartTV Apps), but the end-product still isn't as good or as fast as WMC's interface.Reply

I realize the crowd here skews a little different, but consider Linux' marketshare at less than 2%. Not to mention the endless whining - "Ubuntu sucks, test it under Mint" "Don't use kiddie distros, use Debian" "I thought you were teh hardc0r3z, use Arch" etc, etc, ad infinitum.

I kid, I kid. But seriously, probably more work than it's worth, really, since you would essentially be nearly doubling the work of reviews, and it would split half the work for 90% of the market, half the work for the remaining 10% (round up on Linux marketshare to an even 2% and say it's maybe 5x more common amongst the AT crowd.)Reply

Well, I want Linux content so I'm asking for it. If enough people ask nicely then maybe one day AnandTech will provide more Linux content.

Also, it's not just the Linux crowd who talk about being "l33t" and all that. I see it a lot among PC builders (many of them comment here as well) who like adding useless LEDs to everything and talk about how cool their water cooling solution is especially because it has LEDs on it. The same with video encoding, video playback and anything where you can categorize yourself in. Whatever topic you talk about, there are always going to be a group of immature people who think they're superior to everyone else.Reply

As for the whole market share thing. Just look at the articles here on AnandTech. What percent of the population or even just the readers of this site actually do OpenCL/CUDA programming, use 10 GbE NAS's and switches, rackmount anything, $5000 workstations, administrate servers, etc. yet AnandTech writes articles about them?Reply

In my opinion, these NUC computers are still way too expensive for what you get. For less than $680, you can get a laptop with i5, a SSD, memory and wifi - not to mention the screen, keyboard, battery, operating system installed, optical drive if you want, and ability to use it anywhere when you want. Granted, a laptop is much bigger and heavier. But if you are willing and able to build a NUC, you can easily build a small shelf for a laptop in the back of a desk or somewhere, hidden out of sight just like a NUC.

When I replaced my HTPC, I chose a refurbished i3 laptop for about $220 delivered. It is usually in a cabinet, and I can take it with me when I travel if I want. Reply

For those of us with a big tv or projector having a small second screen make a lot of sense. If I only wish to play music, why should I have my 60" tv turned on? NAC is right, if a similar laptop is $500, why does the NUC cost more for less?Reply

Yeah, but isn't having options grand? In your theoretical example, I'm now paying for a bunch of stuff I don't use - battery, screen, kb, etc. Assuming I want strictly something to plug into the TV and shove into a cabinet.

For me, I'm seriously considering a NUC for when I replace my wife's PC next summer. There's currently a mid-ATX tower on the coffee table in my living room, and I'm definitely going smaller next time around. Now it's just a question of how small I can go for the money it will cost.

To be honest, though, the discussion would be very nearly settled if there were Mini-ITX options for AMD FM2 processors. Haswell's nice, but I don't know that I can bring myself to pay Intel prices when the time comes.Reply

I've had one of these since they came out in the UK and it's a very good as a dedicated streaming device running XBMC on Linux. You can set the minimal fan speed to 20% in the BIOS and it runs practically silent. If it needs to ramp up (say when playing a game on a emulator then it can).

I have i3 Haswell NUC, and it's a pretty good unit all-around. I'm currently waiting for a good fanless third-party case, because while the NUC is fairly quiet, it's still audible in a quiet room. The fan's noise is also a little whiny, which I am not a fan of. There are announcements for fanless options that will provide 2.5" drive options as well, which could be good for creating a network-based DVR.

As for the inability to bitstream, I have that exact same problem, and it's rather bewildering. My NUC was fine as I could bitstream without any problems in PLEX (WASAPI is the only option for bitstreaming in PLEX). As you can guess based on my choice in verb tense, I have the problem now, but it's strange how it appeared. Everything was fine until I loaded up a TV stream (networked from an InfiniTV 6 ETH) in WMC7, and I noticed that I wasn't getting any sound. Now, I can no longer bitstream in PLEX. I also cannot bitstream on my i3-3225-based HTPC either. I've also had this problem on an i7 860 + GTX 660 Ti system as well, but that went away with a graphics driver upgrade.

Anyway, you can get a temporary fix on the problem by setting your speaker configuration up in Windows, and telling your front-end (XBMC, PLEX, etc.) that your receiver is not Dolby Digital- and DTS-compatible. So, now my AVR just says "MULTI-CH IN" all the time as it's just getting a PCM stream from the PC.Reply

There is no problem with the bitstreaming from MPC-HC or any of the other media players which support that... It is only within XBMC in DirectSound mode and Netflix app.

That said, I was able to bitstream successfully even from OpenELEC (which means users don't have to pay the Windows tax to make a very capable media streamer, except when Blu-ray menus are needed)Reply

I wonder how this would compare - say to a Mac Mini. It seems that if the price difference between the two systems isn't more than $100-150 - why would I want to go with something like this vs. a Mac mini? (not to be an Apple fanboy or anything - but moreso for a complete pro/con analysis of each solution/type of solution in order to determine which is better in terms of technical specifications, performance, etc...)Reply

size of chassis is not the issue, it's never been the issue as can be clearly seen in the Mac Pro. What we need to look at is the particulars, the shapes and the size of the things that do matter to thermal efficiency. So if this thing had the fan that it should have in it due to its giant size (yes, I'm calling this NUC business GIGANTIC vs Surface Pro). I remember back in the day taking duct tape and sealing all the extra ridiculous vents on my desktop's case only to see noise and temperature reductions!! The idea that huge cases with a bunch of random vents are good thermal design is really wrong on so many levels. One well placed asymmetric fan is sufficient for a MacBook Pro... I'm just not understanding the general lack of expectations and standards. I expect so much more.Reply

Just built one one of these and am very impressed. It's used for audio editing. Very very tiny and doesn't make much noise. I can't believe it's more powerful than the shuttle or fractal design mini itx I built last year. Hope to see more work being done in tiny form factor desktops.Reply

Hi, are you guys aware that you can increase the TDP of the i5 model in the BIOS settings or using intel Extreme Tuning Utility?It is possible to up the TDP of the i5-4250u to 30w, which gives the GPU 24W and greatly improves performance.Is there any chance you could re-run some tests to see the difference between 15W TDP and 30W?Reply